CA2077517C - Toothbrush - Google Patents
Toothbrush Download PDFInfo
- Publication number
- CA2077517C CA2077517C CA002077517A CA2077517A CA2077517C CA 2077517 C CA2077517 C CA 2077517C CA 002077517 A CA002077517 A CA 002077517A CA 2077517 A CA2077517 A CA 2077517A CA 2077517 C CA2077517 C CA 2077517C
- Authority
- CA
- Canada
- Prior art keywords
- pin
- handle
- brush head
- bearing
- recess
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 235000008429 bread Nutrition 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 241000937413 Axia Species 0.000 description 1
- 241001117214 Saica Species 0.000 description 1
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 235000019988 mead Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B5/00—Brush bodies; Handles integral with brushware
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B5/00—Brush bodies; Handles integral with brushware
- A46B5/0095—Removable or interchangeable brush heads
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B7/00—Bristle carriers arranged in the brush body
- A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B7/00—Bristle carriers arranged in the brush body
- A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers
- A46B7/046—Threaded or screw connections for bristle carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G3/00—Attaching handles to the implements
- B25G3/02—Socket, tang, or like fixings
- B25G3/12—Locking and securing devices
- B25G3/30—Locking and securing devices comprising screwed sockets or tangs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G3/00—Attaching handles to the implements
- B25G3/02—Socket, tang, or like fixings
- B25G3/12—Locking and securing devices
- B25G3/32—Locking and securing devices in association with, or including, tang, bolt, or other member passing axially through whole length of handle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/08—Locking of screws, bolts or nuts in which the locking takes place after screwing down with a cap interacting with the nut, connected to the bolt by a pin or cotter pin
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B2200/00—Brushes characterized by their functions, uses or applications
- A46B2200/10—For human or animal care
- A46B2200/1066—Toothbrush for cleaning the teeth or dentures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/60—Biased catch or latch
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/60—Biased catch or latch
- Y10T403/602—Biased catch or latch by separate spring
Abstract
The invention relates to a toothbrush (20), the brush head (22) of which can be removed from a brush handle (24). A threaded pin (26) can be moved to a limited extent out of the brush handle (24), counter to the action of a prestressing spring (32), when the brush head (22) is screwed onto the said pin, until a stop catch (36) of the brush head (22) engages in a recess (38) of the brush handle (24) and locks the brush head in the rotational direction, while the prestressing spring (32) holds the brush head (22) under prestress against the brush handle (24). A firm connection can thus be established simply and rapidly between the brush handle and the brush head, irrespective of the shape of these parts.
Description
Toothbrush The invention relates to a toothbrush, the brush head of which is removably secured on the brush handle, it being possible to screw a threaded pin protruding from the front end of the brush handle, that end which faces the brush head, in a manner fixed against twisting into a threaded hole in the rear end of the brush head, that end which faces the brush handle.
A toothbrush of this generic type is known from German Utility Model 7,600,205. In this toothbrush, a fixing screw, which can be screwed into a threaded bore in the brush head, is arranged on a spindle which extends through a longitudinal bore in the brush handle and is actuated by means of a rotary knob situated at the end of the brush handle. The angular position of the brush handle relative to the brush head is secured by guide pins on the brush handle which engage in corresponding guide boxes in the brush head. In the assembly of the toothbrush, the brush head is first of all placed on the guide pins of the brush handle, then moved along in the axial direction towards the brush handle on the guide pins and, finally, tightened by actuating the rotary knob at the end of the brush handle.
The two printed publications described below disclose a method for connecting two components to one another in which the two parts are moved in a translatory manner relative to one another, counter to the force of a prestressing device, and a catch snaps in at the end of this operation.
Thus, DE 31 30 703 A1 discloses a handle fixing device which comprises a coupling sleeve and an insertion spigot which are attached to the handle and to a tool respectively. Here, an insertion spigot of rectangular cross-section is.locked within an insertion hole of the coupling sleeve by the fact that a right-angled portion of a leaf spring engages in a locking hole of the inser-tion spigot. This positive locking can be released by ~0'~"~~~'~
A toothbrush of this generic type is known from German Utility Model 7,600,205. In this toothbrush, a fixing screw, which can be screwed into a threaded bore in the brush head, is arranged on a spindle which extends through a longitudinal bore in the brush handle and is actuated by means of a rotary knob situated at the end of the brush handle. The angular position of the brush handle relative to the brush head is secured by guide pins on the brush handle which engage in corresponding guide boxes in the brush head. In the assembly of the toothbrush, the brush head is first of all placed on the guide pins of the brush handle, then moved along in the axial direction towards the brush handle on the guide pins and, finally, tightened by actuating the rotary knob at the end of the brush handle.
The two printed publications described below disclose a method for connecting two components to one another in which the two parts are moved in a translatory manner relative to one another, counter to the force of a prestressing device, and a catch snaps in at the end of this operation.
Thus, DE 31 30 703 A1 discloses a handle fixing device which comprises a coupling sleeve and an insertion spigot which are attached to the handle and to a tool respectively. Here, an insertion spigot of rectangular cross-section is.locked within an insertion hole of the coupling sleeve by the fact that a right-angled portion of a leaf spring engages in a locking hole of the inser-tion spigot. This positive locking can be released by ~0'~"~~~'~
means of a latch in the form of a push button or sliding sleeve. The push button is seated on the angled end of the leaf spring, allowing the right-angled portion of the latter to be lifted out of the insertion hole. Using the sliding sleeve, the spring can be lifted out via a slid-ing joint involving oblique surfaces if the sleeve is displaced axially counter to spring force.
DE 8? 00 502 U1 describes a coupling for the connection of a broom or the like to a handle. A lock-in pro jection is arranged at the free end of a spigot, on one longitudinal side of the latter. On its opposite longitudinal side, the spigot has a recess which reduces the height of the spigot, extends over the width of the spigot and the length of which is smaller than the inser-tion length of the spigot in the sleeve. The sleeve has an internal cross-section which is matched to the maximum spigot cross-section. On one side, the sleeve is provided with a lock-in recess for the lock-in projection and, on the opposite side, with a longitudinal groove for a tongue which is guided therein and projects into the internal cross-section of the sleeve. The tongue is supported on an axial spring and connected to a slide arranged on the outside of the sleeve. In the locked condition, the tongue engages under the spigot on the longitudinal side which lies opposite the lock-in projection.
The object on which the invention is based is to configure the toothbrush of the abovementioned known generic type in such a way that the brush head can be secured on the brush handle rapidly, reliably and in a manner secure against release of the connection by children, whatever the shape of the brush handle and brush head, with as large as possible a saving of material for the replaceable brush head.
The invention solves this object by virtue of the fact that the threaded pin is mounted in an axial sliding bearing in the front end of the brush handle in such a way that it can be moved to a limited extent axially out of the brush handle, counter to the force of a 2~ ~'~~~r~
DE 8? 00 502 U1 describes a coupling for the connection of a broom or the like to a handle. A lock-in pro jection is arranged at the free end of a spigot, on one longitudinal side of the latter. On its opposite longitudinal side, the spigot has a recess which reduces the height of the spigot, extends over the width of the spigot and the length of which is smaller than the inser-tion length of the spigot in the sleeve. The sleeve has an internal cross-section which is matched to the maximum spigot cross-section. On one side, the sleeve is provided with a lock-in recess for the lock-in projection and, on the opposite side, with a longitudinal groove for a tongue which is guided therein and projects into the internal cross-section of the sleeve. The tongue is supported on an axial spring and connected to a slide arranged on the outside of the sleeve. In the locked condition, the tongue engages under the spigot on the longitudinal side which lies opposite the lock-in projection.
The object on which the invention is based is to configure the toothbrush of the abovementioned known generic type in such a way that the brush head can be secured on the brush handle rapidly, reliably and in a manner secure against release of the connection by children, whatever the shape of the brush handle and brush head, with as large as possible a saving of material for the replaceable brush head.
The invention solves this object by virtue of the fact that the threaded pin is mounted in an axial sliding bearing in the front end of the brush handle in such a way that it can be moved to a limited extent axially out of the brush handle, counter to the force of a 2~ ~'~~~r~
prestressing device, but cannot be rotated, and is provided at its front end with a thread which can be screwed into the threaded hole of the brush head, a stop catch projecting axially from the rear end of the brush head, to which catch there corresponds an axial recess in the front end of the brush handle, with the result that, when the brush head is screwed onto the threaded pin, the brush head is supported on the front end of the brush handle by means of the stop catch and the threaded pin can be pulled out counter to the action of the prestressing device until the stop catch engages in the recess in the brush handle.
It is especially advantageous if the front end of the brush handle, which accommodates the sliding bearing, is formed by that end of a brush-handle neck which adjoins the brush head, and the threaded hole is integrated into a bristle bed which accommodates the bristles of the brush head. By virtue of this close arrangement of the threaded connection on the brush head, as great as possible a saving of material can be achieved for the disposable brush head.
Tn this arrangement, a centring ring can be arranged at an axial distance from the thread, at the front end of the threaded pin, and a smooth cylindrical portion of the threaded hole, the said portion being situated in the region of the mouth of the threaded hole in the brush head, can serve to receive the centring ring. It may furthermore be expedient if the diameters of the thread and of the centring ring of the threaded pin are larger than the shank of the threaded pin, which is displaceably mounted in the brush handle. The thread and the centring ring can here have the same diameter. In this way, a high strength of the connection between the brush head and the brush handle is achieved.
The axial sliding bearing for the threaded pin in the brush handle can be bounded by a transverse wall which serves as a stop for at least one stop element on the threaded pin, the rear end of which passes axially through a bore in the transverse wall and which _ 4 _.
is connected to om: part of tYne prc>:~t.ress:i.ng ciev_LcE::, the other part of whicrr is secured in the brush handle. The prestressing sprint; can be c:iesigra.ec~ as a compression spring or, alternatively, as a tens:LC7rr spring. A child-proof connection between the br~us~u handle and the bru;~h mead can be achieved by selection of a sua_t:a~:7l.e spring characteristic.
The exclusively axial. guidance of true threaded pin in the sliding bearing of t:ne brush handle c,an be provided by radial projections on th~.:, t:hr°eaded pin wh:ic,~h engage in longitudinally directed recesses of the sliding bearing, allowing only axial mob.il.ity, An angle of rotata.on of 180° is sufficient for securing the brush head on a he k:ar~.~sr~ :hanrile by means of a multi-start thread.
The slidirzg bearirac~ i:rl t. he bruskn handle f: or the threaded pin and the threaded hole in the brush head are preferably composed of the :came mate:e~.ial of which the brush handle and the brush head are respectiveay composed, and are produced integrally with these , ~:?n t 1:1e other hand, the s:Liding bearing and the tklrE:~adec~. f~.ol~~ ca:1 a:Lso be formed by inserted sleeves which are secured in corresponding axial bores of the brush handle arid b:e:u5h l:~eaad respectively.
According to a broad aspect, tl-~e invention provides a toothbrush com;pris:ing: a handle including a first end having a recess formed therein, a second end, a bearing disposed in said :f:i.z-~!::: r.~nd. <~rn:~ a pin slidab:Ly supported within said bearing, said pin r:ornprising a first end, a shank portion and a second end, said pin defining a longitudina:L axia whereby s~3 i ci ~::~i.r~ i;~ sul>pcrted for axial.
movement in said bearing substantially parallel to said _ 4 ~~
longitudinal axis, said first e~.rrc~ co: ~~as.d pin including a threaded portion projecting from said first end of said handle and a centering ring spaced from said threaded portion, said hand~.e fl.zrt.he..~° c~c.rnpr:i.s.:ir:~g =neans for preventing rotation of said pin and prestressina means connected to said second end of said pin :Evor urging said pin in a direction toward. s~r.id secran~.i end o:~: ~~~aid hand~_e arrc~ for permitting limited axial mo~rement of said pin out of said first end of said handle; ar d a brusrknead including a threaded hole operable to t~~reac~ab_l.y engage said threaded portion of said first end ofv sa:id pin, said threaded hole including a cylindx-.ical port~ian operable to receive said centering ring, said bx-ush head ~uxr~t.~ez~ ~:~ompr. ising a stop catch projecting from said brush head operable to engage said recess in said first er:d of said handle, whereby, as said brush head is screwed c>nto said rra.n~::ile, said :stop catch contacts said first end of :;ai.d handle and sand pin is pulled out of said handle counter of tale action of said prestressing means until said stop catch engages said recess.
According to another i>road aspect:., the ir.~vention provides a toothbrush compra_sing: a handle ir~cluding a first end having a recess formed trre~~~in, a second end, a bearing disposed in said fi~:~st end an.~.~ b~aunded by a.
transverse wall having a bore therethrough, and a pin slidably supported within said bearings, :raid pin comprising a first end, a shank portion anc~ a sk=~::~onc:i end, said. pin defining a longitizdi.nal axis whereby ~-zaic:i pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said :ix~st. end o~ said pin including a threaded portion projecting from said i_irst end of said handle, said pin further ~~omprisi.rug ar Least. one stop element whereby sai~~ transverse wall apertures as a stop for said at least one stop element, said second end of said pin extending through aaid bore l.zu said t::ransverse wall. and carrying a support~._ng di~~c, ~~ai.ca h~ai.~c~.~..e further comprising means for preventing rotation of said. pi.n and prestressing means including a helical c~:ampz°essic>ru. spr:irzg dispo;~ed between said transzrerse wale and supporting disc for urging said pin in a di.rec~tion toward ,acid ,ec:cEnd end of ::~ai.d handle and for perrtitt:ing l i.rr~itec~ a:x:~.a,:l.. nuovement o:F said pin out of said first end off: saad handle; and a brush head including a threaded hole opm.~ablf~ tc~ t:h:readably engage said threaded portion of said first: end of said pin, and a stop catch projecting fx om said ~::~z:tzsh. tm~c;l operable to engage said recess in said first. ezzd caf saica handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of ;:5~:z:i,.d Yz,~rtd:~,e and said pir~ i.s pulled out of said handle cc>unter of. the action of said prestressing means until. said stop catch engages s<~.id recess.
According to a fuz-t~cer bread aspect, the invention provides a toothbrush compr~_s~.rac~: a h.and:lF irucludang a first end having a recess formed therein, a second end, a bearing disposed ir. said .f:i:rv~t end and a pin slidably supported within said bearirzg, said pin comprising a first end, a shank portion and a second end, said ps.n defining a longitudinal axis wYiereby said p:in :is supported foz: axial movement in said bearing substantially parallel to said longitudinal axis, said firs=;t end e:~f sai~::~ Yoin ineltzding a threaded portion projecting from said fi.~st end of said handle, said handle further comprising means for preventing rotation of said pin, said mean;:, Yor pre~renting rogation o.f said pin comprising longitudinally direct=ed, closed-ended recesses provided in said b~az:irzg arid a. j~lurality c>f spaced apart , radially p:rc j ect.,:i.nc~ t::rG~r~.~;,wer_ se pins prcwi.ded on said -- 4 e, -shank portion that engage said .reces~.es, said handle further comprising prestressing means connected to said second end of said pin for urc,~ing said pi.rn :i:~ ~~. direction toward said second end of said handle and for pez~mitting limited axial movement of said p~_n out: of said fi.rwt e.nd of said handle;
and a brush heat! irECludirxg ~~ t:rx.~eadecC hole operable t:o threadably engage said threaded portion of said first end of said pin, and a stop catch ~~xwoj~~ctiriq from said brush head operable to engage said recess in said first end of said handle, whereby, asaid brush head i.s screwed onto said handle, said stop c:~atch cantact:s :~a~i.c~. fi.rst;: end of said handle and said pir.~ is pulled out of said handle counter of the action of said prest.r~es:~irzg means anti:L said stop catch engages said reces~~.
According to a f.u:rvtt~r.ex.- broad aspect, t:he invention provides a toothbrush comprising: a handle including a f first end having a r~ece:ss f<::y:rox~ec:~ tr°Ge~rc~in, a second end, a bearing disposed i.n sai.d first end and a p~.n slidably supported within said bearing, said pin comprising a first end, a shank portion and a c.~c~orGd ervd, s,a:~_cf pi.n def:fining a longitudinal axis whereby said pin is supported for axial movement in said bearing suhstaxitially parallel to said longitudinal axis, said first crud of said pin inclLiding a threaded portion projecting from said first end of said handle, said hand:Le further c::~m,~:~risi:n~3 mc~arns for preventing rotation of said pin, said. means for preventing rotation of said pin comprising longitudinally di:recr;ed grooves provided in said bearing arZd a plum ~i.ty of l.oangit~ud.i.nall.y cLirected ribs provided on said shank portion that engage said grooves, said handl;~ furtheac~ampris ing Larestressirig means connected to said second enci of said pin f or urging said pin in a direction toward said second end of said handle and for permitting limited axial rnovemerrt of: :~ai~3 pin out of said ._ ~~ d _..
first end of said r~.andle; az:rd a brush. head including a threaded hole operable to tl~areadably engage said threaded portion of said f first end o~ ~a.~~.<~ pin, arid a stop catch projecting from said brush head operable to engage said recess in said first. end of said handle, whereby, ins said brush head is screwed onto said handle, said stop catch contacts said first end of : a:ed hand.la=. a:rnd said pin is pulled out of said handle counter of tle action of said prestressing means until sal_d stop catch engages said recess.
According to a further broad a~apect, the .invention provides a toothbrush comprising: a hanc~.le including a first end having a recess fc~rrnec~~ the:r~=in, a second end, a bearing disposed in said first end an{~ a pin slidably supported within said bearing, <~~a~i.c~ g~:~r; c:;omprising a first end, a shank portion and a second end, said pin defining a longitudina:L axis whereby said ~:~i.r~ is su~:aported for axial.
movement in said bearing substantially parallel to said longitudinal axis, said f:ir.Tt. er~.d o,f ,~aic'i pin including a threaded portion projecting from said fiJ:~st end of said handle, said handle further comprising means for preventing rotation of said pi:~:a and preast~r~=_ssi.ng :neaps connected to said second end of said pin for urgings said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; ar~~ a brus~n hecid defining a longitudinal direct:i.on, said br.~.zsh head laving a first side and bristles pro;ject~ing Pram :~a.i.d f:i~:~-~t: :.,fide substantially tz°ansverse to sa_Ld aongi.tx.~dirla:l direc:t:.:iorn., said brush head further including a threaded hole extends_ng substantially in said longitudinal direct:ion axed opera~::>a_e to threadably engage said threaded portion of said first end of said pin, and a tongue shaped stop catcra projec~::inc~ from an end of __ 4 a ._ said brush head and ext.endiric~ s~zbst.antia:Lly in said longitudinal direction and operable to engage said recess in said first end of said handle, whereby, s~s said brush head is screwed onto said handle, said stop catch contacts said first end of said handle anc:i said. pi.n i.s pulled out: of said handle counter of the action of said prest.ressing means until said stop catch engage=s s~rid recess .
According to a fux-thex: broad aspect, the invention provides a toothbrush compr_i:~in<3: a ~°nancll.e including a first end having a recess formed therein, a second end, a substantially cylindrical bore 3.yrov.ided :in said first end, a bearing formed as a sleeve inserted :in s<~id substantially cylindrical bore, and a ;pi.n slidabl.y ~supi~az°t,ed within said bearing, said pin comprising a first end, a shank portion and a second end, said pin c~efirzing <~ lor-~gitudin.al axis whereby said pin is supported fc..~r axial movement in said bearing substant ial 1y par~ll.e L t::o sai.c:i 3.c~nga_tudinal axis, said first end of said pin including a threaded portion projecting from ,~aic:~ first ~anc~ of sa.lc:~. handle, said h<~ndl.e further comprising means for preventing rotation of said pin and prestressing means conneact~ec~. to s<,r:id second end o.f said pin for urging said pin in a direction toward said second end of said hand:Le and fo:e~ per~na~ttinc:~ l znwi.ted axial movement of said pin out of said first ernd of said handle; and a bx:ush head incluclin<:~ a tlzreadE.d hc:le c:>perable to threadably engage said threaded portion of said first end of said pin, and a stop catch prcaject:ing from sa:ici brush head operable to engage said recess :in said f irst~ end c>>f raid handle, whereby, as said bri.zsh head i:~ s crewed onto said handle, said stop catch contacts said first er~rd c:~f said .handle and said pin is pulled out. of said hand:L.e cou.nter of the action of said prestressiru~ means u:rt.:i.J. said st~cvp catch engages said recess.
_ 4 f= _..
A.ccordinc~ to a fu:rvtrher bread aspect, the invention provides a toothbrush comprising: a. handle including a first end having a reces:~ frvr~rneci trverein, a second end, a bearing disposed in said fi:e:~~>t= eand and a pi_n ~>lidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pzrr:~ i.~ sui:~ported for axial movement in said bearing substantially parallel to said longitudinal axis, said first er~d Uf said pin including a threaded portion projecting fronu said first, end of said handle, said handle further c_omprisin::~ means for preventing rotation of said pin and prestressing means connected to said second end of said pin f:c:~r~ urgi n~ s<~id pin in a direction toward sa~.d second end of said handle and. for permitting limited axial mavement of said pin out of said first end of said handle; and -~~ brush he<~d inclu.din.g a threaded hole operable to trreadably S,~ngK~ge said. threaded portion of said first end of: said pin, and a stop catch projecting from ;~aic:.i brush Y~ead opexv-~i.~le to engage said recess in said first end of said. handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first: end of said hand:~~arid said pin is pulled out of sa:id handle cc:>ur~t~e>r of t:he action of said prestressing means until said stop catch engages said recess.
The invention :is explained .in greater detail below with reference to tine schema.t~~_c°: d:x:aw:i_r~g c:f several illustrative embodiments, in wha_ctz:
Fig. 1 shows a bottom view of ~. toothbrush with mounted brush head, __ ,fig __ Fig . 2 shows the t~c~otl~~brush according to Fig . 1 in a partially sectioned view along the longitudinal centre line, Fig. 3 shows the toothbrush in accordance with Fig. 2 with the brush reread r emo5red and a sliding bewaring sleeve for a threaded pin in partially broken-away representation, Figs. 4 and 5 show twa different modified embodiments of the threaded pin. witr~ia p:restressing device in a section taken perpendiculax°ly .~~v~~' through the longitudinal centre line and in partially broken-away representation, Fig. 6A and Fig. 6B show a view of the rear end of the brush head in accordance with B-B in Fig. 3 in an insertion position and in the operating position, Fig. 7A and Fig. 7B show a view of the rear end of the brush head similar to that in Fig. 6B, with a two-start or three-start thread, Fig. 8 shows a view A-A in Fig. 3, with an inserted sleeve for the threaded pin and Fig. 9 shows a view similar to A-A in Fig. 3 but with a sliding bearing for the threaded pin, the said sliding bearing being integrated into the brush handle.
The dxawings illustrate a toothbrush 20, the brush head 22 of which is removably secured on the brush handle 24. In accordance with Figs. 2 and 3, a threaded pin 26, preferably composed of plastic, which projects from the front end of the brush handle 24, that end which faces the brush head 22, can be screwed into an integral threaded hole 28 which is arranged in a reinforced part of a bristle bed 33; the said part accommodating the bristles 29 of the brush head ;22, in the rear end of the brush head 22, that end which faces the brush handle 24. According to the present invention, the threaded pin 26 is mounted in an axial sliding bearing 30 in the front end of a neck 31 of the brush handle 24 in such a way that it can be moved to a limited extent axially out of the front end of the brush handle 24, counter to the force of a prestressing device 32, but cannot be rotated.
At its front end, the threaded pin 26 is pxovided with a thread 34 which can be screwed into the threaded hole 28 of the brush head 22. Projecting axially from the rear end of the brush head 22, on the side of the bristles 29, is a stop catch 36, to which there corresponds an axial recess 38 in the front end of the brush handle 24. When the brush head 22 is screwed on, the stop catch 36 comes to rest against the end face 40 of the front end of the brush handle 24 after a small angle of rotation. If the screw-on movement of the brush head 22 is continued or a corresponding screw-in movement of the brush handle 24 into the brush head 22 is performed, the threaded pin 26 is pulled out of the front end of the brush handle 24 counter to a prestressing device 32 in accordance with the thread pitch, until the stop catch 36 engages in the recess 38 at the front end of the brush handle 24 and assumes its non-rotatable working position in which it is braced axially in relation to the brush handle 24. If the brush head 22 is to be replaced by another, new brush head, the brush head need only be pulled axially away from the end face 40 of the front end of the brush handle 24 by the length of the stop catch 36, counter to the force of the prestressing device 32, in order to unscrew the brush handle 24 from the thread 34 in the opposite direction of rotation. Fig. 6A depicts the starting position of the brush head 22 for its mounting on the brush handle 24 as well as an arrow X extending over 180°, the said arrow indicating that a half rotation of the brush head 22 for its mounting on the brush handle 24 is sufficient to enable it to assume the working position in accordance with Fig. 6B. As Fig. 7A and Fig. 7B show, a two-start thread 42 or a three-start thread 44 are to be preferred for connecting the brush head 22 and the brush handle 24. The thread 34 and the centring ring 46 expediently have the same diameter.
From Figs. 2 and 3, it can be seen that a centring ring 46 is arranged at the front end of the threaded pin 26, at an axial distance from the thread 34.
Provided in the region of the mouth of the threaded hole 28 in the brush head 22 is a smooth cylindrical portion 48 of the threaded hole 28 for receiving the centring ring 46. The diameters of the thread 34 and of the centring ring 46 of the threaded pin 26 are larger than the shank 50 of the threaded pin, which is displaceably mounted in the brush handle 24. The thread 34 and the centring ring 34 expediently have the same diameter.
As Figs. 2 and 3 furthermore show, the sliding bearing 30 in the brush handle 24 far the threaded pin 26 - 7 - ~fl'~~~~~
is bounded by a transverse wall 52 which serves as a stop for an annular shoulder 54 on the inner end of the threaded pin 26. The transverse wall 52 is provided with an axial bore 56, which has a smaller diameter than the shank 50 of the threaded pin 26 and continues in a guide sleeve 60 towards the inner cavity 58 of the brush handle 24. A guide rod 62 extends through this bore 56 in the transverse wall 52 and through the guide sleeve 60 from that end of the shank 50 of the threaded pin 26 which forms the annular shoulder 54, a supporting disc 64 being secured on 'the outer end of this guide rod 62. The prestressing device 32, which, in the illustrative embodiment of Figs. 2 and 3, is designed as a helical compression spring, is guided on the guide sleeve 60 of the transverse wall 52 and is supported by its two ends between the transverse wall 52 and the supporting disc 68, with the result that the threaded pin 26 is continuously prestressed in the direction of the transverse wall 52.
The shank 50 of the threaded pin 26 is provided with radial projections which engage in longitudinally directed recesses of the sliding bearing 30, allowing only axial mobility. According to Figs. 2 and 3, the radial projections of the shank 50 comprise two trans-verse pins 70 arranged at an axial distance from one another, which project radially from the shank 50 of the threaded pin 26 and engage in elongated slots 72 which only permit axial disglacement and not rotation of the threaded pin 26. According to the illustrative embodiment in Figs. 2 and 3, the diametrically opposite elongated slots 72 for the transverse pins 70 are provided in an inserted sleeve 74 which is inserted into a cylindrical bare 76 in the front end of the brush handle 24 and is arranged therein in a manner which prevents axial dis-placement and fixed in terms of rotation. The inserted sleeve 74 expediently has a polygonal external profile 78, as Fig. 8 shows.
According to another embodiment in Figs. 4 and 5, a threaded pin 80 is provided with longitudinal ribs 82 s - ~ '~ '~ ~~ v ~'~
which are distributed at angular intervals over the circumference and engage with limited longitudinal dis-placeability in corresponding longitudinal grooves 84 of a sliding bearing 85 in the brush handle 86, 'the said longitudinal grooves 84 being delimited at the ends and being moulded directly in the material of a brush handle 86, integrally with the latter. In this case, the threaded pin 80 passes with the same diameter through the front end and a transverse wall 88 of the brush handle 86, which are likewise an integral part of the brush handle 86. Secured on the inner end of the threaded pin 80, which protrudes from the transverse wall 88, is one end of a leaf spring 90 which forms the prestressing device, its other, curved end being placed around a transverse peg 92 in the brush handle 86.
Fig. 5 shows a similar embodiment to that in Fig. 4, identical parts thus being provided with identi-cal reference numerals to those in Fig. 4. As in Fig. 4, a single leaf spring 94 is secured on the inner end of the threaded pin 80 but is then oriented in an S shape towards the interior of a brush handle 96. The other end of the leaf spring 94, which extends axially to the threaded pin 80, is fixed in a transverse wall 98 of the brush handle 86.
The various brush handle embodiments described above comprise hollow handle longitudinal halves produced by injection moulding, into which, as has been described, either the inserted sleeves for the sliding bearing of the threaded pin, the latter likewise preferably being composed completely of plastic, are inserted or in which the sliding bearings are integrally moulded from the plastic material of the brush handle halves by injection, before the associated halves of the thread are firmly welded together, e.g. by high-frequency welding. It should also be understood that it is also possible, when the brush head is produced by injection moulding of plastics, for the threaded hole with, the associated thread to be integrally moulded or, alternatively, for the threaded hole likewise to be formed by a sleeve around which the brush head is moulded or which is inserted into a correspanding bore in the brush head after the moulding of the brush head. The hollow con-figuration of the brush handle saves material and reduces the weight of the said handle, making possible more sensitive cleaning of the teeth with the toothbrush. If required, the threaded pin can be arranged in the brush head and the threaded hole in the brush handle, although the embodiments described above are generally to be preferred.
In all the cases described, the strength of the spring can be designed sc that it is impossible for small children to separate the brush head from the brush handle. The prestressing spring can also be manufactured from plastic.
~~ ~'~~~'l List of reference numerals 20 Toothbrush 22 Brush head 24 Brush handle 26 Threaded pin 28 Threaded hole 29 Bristles 30 Sliding bearing 31 Handle neck 32 Prestressing device 33 Bristle bed 34 Thread 36 Stop catch 38 Recess 40 End face 42 Two-start thread 44 Three-start thread 46 Centring ring 48 Smooth cylindrical portion 50 Shank .
52 Transverse wall 54 Annular shoulder 56 Axial bore 58 Cavity 60 Guide sls~eve 62 Guide rocl 64 Supporting disc 66 Helical compression spring 70 Transverse pin 72 Elongated slats 74 Inserted sleeve 76 Cylindrical bore 78 External profile 80 Threaded pin 82 Longitudinal ribs 84 Longitudinal grooves 85 Sliding bearing 86 Brush handle - 11 - h 88 Transverse wall 90 Leaf spring 92 Transverse peg 94 Leaf spring 96 Brush handle 98 Transverse wall
It is especially advantageous if the front end of the brush handle, which accommodates the sliding bearing, is formed by that end of a brush-handle neck which adjoins the brush head, and the threaded hole is integrated into a bristle bed which accommodates the bristles of the brush head. By virtue of this close arrangement of the threaded connection on the brush head, as great as possible a saving of material can be achieved for the disposable brush head.
Tn this arrangement, a centring ring can be arranged at an axial distance from the thread, at the front end of the threaded pin, and a smooth cylindrical portion of the threaded hole, the said portion being situated in the region of the mouth of the threaded hole in the brush head, can serve to receive the centring ring. It may furthermore be expedient if the diameters of the thread and of the centring ring of the threaded pin are larger than the shank of the threaded pin, which is displaceably mounted in the brush handle. The thread and the centring ring can here have the same diameter. In this way, a high strength of the connection between the brush head and the brush handle is achieved.
The axial sliding bearing for the threaded pin in the brush handle can be bounded by a transverse wall which serves as a stop for at least one stop element on the threaded pin, the rear end of which passes axially through a bore in the transverse wall and which _ 4 _.
is connected to om: part of tYne prc>:~t.ress:i.ng ciev_LcE::, the other part of whicrr is secured in the brush handle. The prestressing sprint; can be c:iesigra.ec~ as a compression spring or, alternatively, as a tens:LC7rr spring. A child-proof connection between the br~us~u handle and the bru;~h mead can be achieved by selection of a sua_t:a~:7l.e spring characteristic.
The exclusively axial. guidance of true threaded pin in the sliding bearing of t:ne brush handle c,an be provided by radial projections on th~.:, t:hr°eaded pin wh:ic,~h engage in longitudinally directed recesses of the sliding bearing, allowing only axial mob.il.ity, An angle of rotata.on of 180° is sufficient for securing the brush head on a he k:ar~.~sr~ :hanrile by means of a multi-start thread.
The slidirzg bearirac~ i:rl t. he bruskn handle f: or the threaded pin and the threaded hole in the brush head are preferably composed of the :came mate:e~.ial of which the brush handle and the brush head are respectiveay composed, and are produced integrally with these , ~:?n t 1:1e other hand, the s:Liding bearing and the tklrE:~adec~. f~.ol~~ ca:1 a:Lso be formed by inserted sleeves which are secured in corresponding axial bores of the brush handle arid b:e:u5h l:~eaad respectively.
According to a broad aspect, tl-~e invention provides a toothbrush com;pris:ing: a handle including a first end having a recess formed therein, a second end, a bearing disposed in said :f:i.z-~!::: r.~nd. <~rn:~ a pin slidab:Ly supported within said bearing, said pin r:ornprising a first end, a shank portion and a second end, said pin defining a longitudina:L axia whereby s~3 i ci ~::~i.r~ i;~ sul>pcrted for axial.
movement in said bearing substantially parallel to said _ 4 ~~
longitudinal axis, said first e~.rrc~ co: ~~as.d pin including a threaded portion projecting from said first end of said handle and a centering ring spaced from said threaded portion, said hand~.e fl.zrt.he..~° c~c.rnpr:i.s.:ir:~g =neans for preventing rotation of said pin and prestressina means connected to said second end of said pin :Evor urging said pin in a direction toward. s~r.id secran~.i end o:~: ~~~aid hand~_e arrc~ for permitting limited axial mo~rement of said pin out of said first end of said handle; ar d a brusrknead including a threaded hole operable to t~~reac~ab_l.y engage said threaded portion of said first end ofv sa:id pin, said threaded hole including a cylindx-.ical port~ian operable to receive said centering ring, said bx-ush head ~uxr~t.~ez~ ~:~ompr. ising a stop catch projecting from said brush head operable to engage said recess in said first er:d of said handle, whereby, as said brush head is screwed c>nto said rra.n~::ile, said :stop catch contacts said first end of :;ai.d handle and sand pin is pulled out of said handle counter of tale action of said prestressing means until said stop catch engages said recess.
According to another i>road aspect:., the ir.~vention provides a toothbrush compra_sing: a handle ir~cluding a first end having a recess formed trre~~~in, a second end, a bearing disposed in said fi~:~st end an.~.~ b~aunded by a.
transverse wall having a bore therethrough, and a pin slidably supported within said bearings, :raid pin comprising a first end, a shank portion anc~ a sk=~::~onc:i end, said. pin defining a longitizdi.nal axis whereby ~-zaic:i pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said :ix~st. end o~ said pin including a threaded portion projecting from said i_irst end of said handle, said pin further ~~omprisi.rug ar Least. one stop element whereby sai~~ transverse wall apertures as a stop for said at least one stop element, said second end of said pin extending through aaid bore l.zu said t::ransverse wall. and carrying a support~._ng di~~c, ~~ai.ca h~ai.~c~.~..e further comprising means for preventing rotation of said. pi.n and prestressing means including a helical c~:ampz°essic>ru. spr:irzg dispo;~ed between said transzrerse wale and supporting disc for urging said pin in a di.rec~tion toward ,acid ,ec:cEnd end of ::~ai.d handle and for perrtitt:ing l i.rr~itec~ a:x:~.a,:l.. nuovement o:F said pin out of said first end off: saad handle; and a brush head including a threaded hole opm.~ablf~ tc~ t:h:readably engage said threaded portion of said first: end of said pin, and a stop catch projecting fx om said ~::~z:tzsh. tm~c;l operable to engage said recess in said first. ezzd caf saica handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of ;:5~:z:i,.d Yz,~rtd:~,e and said pir~ i.s pulled out of said handle cc>unter of. the action of said prestressing means until. said stop catch engages s<~.id recess.
According to a fuz-t~cer bread aspect, the invention provides a toothbrush compr~_s~.rac~: a h.and:lF irucludang a first end having a recess formed therein, a second end, a bearing disposed ir. said .f:i:rv~t end and a pin slidably supported within said bearirzg, said pin comprising a first end, a shank portion and a second end, said ps.n defining a longitudinal axis wYiereby said p:in :is supported foz: axial movement in said bearing substantially parallel to said longitudinal axis, said firs=;t end e:~f sai~::~ Yoin ineltzding a threaded portion projecting from said fi.~st end of said handle, said handle further comprising means for preventing rotation of said pin, said mean;:, Yor pre~renting rogation o.f said pin comprising longitudinally direct=ed, closed-ended recesses provided in said b~az:irzg arid a. j~lurality c>f spaced apart , radially p:rc j ect.,:i.nc~ t::rG~r~.~;,wer_ se pins prcwi.ded on said -- 4 e, -shank portion that engage said .reces~.es, said handle further comprising prestressing means connected to said second end of said pin for urc,~ing said pi.rn :i:~ ~~. direction toward said second end of said handle and for pez~mitting limited axial movement of said p~_n out: of said fi.rwt e.nd of said handle;
and a brush heat! irECludirxg ~~ t:rx.~eadecC hole operable t:o threadably engage said threaded portion of said first end of said pin, and a stop catch ~~xwoj~~ctiriq from said brush head operable to engage said recess in said first end of said handle, whereby, asaid brush head i.s screwed onto said handle, said stop c:~atch cantact:s :~a~i.c~. fi.rst;: end of said handle and said pir.~ is pulled out of said handle counter of the action of said prest.r~es:~irzg means anti:L said stop catch engages said reces~~.
According to a f.u:rvtt~r.ex.- broad aspect, t:he invention provides a toothbrush comprising: a handle including a f first end having a r~ece:ss f<::y:rox~ec:~ tr°Ge~rc~in, a second end, a bearing disposed i.n sai.d first end and a p~.n slidably supported within said bearing, said pin comprising a first end, a shank portion and a c.~c~orGd ervd, s,a:~_cf pi.n def:fining a longitudinal axis whereby said pin is supported for axial movement in said bearing suhstaxitially parallel to said longitudinal axis, said first crud of said pin inclLiding a threaded portion projecting from said first end of said handle, said hand:Le further c::~m,~:~risi:n~3 mc~arns for preventing rotation of said pin, said. means for preventing rotation of said pin comprising longitudinally di:recr;ed grooves provided in said bearing arZd a plum ~i.ty of l.oangit~ud.i.nall.y cLirected ribs provided on said shank portion that engage said grooves, said handl;~ furtheac~ampris ing Larestressirig means connected to said second enci of said pin f or urging said pin in a direction toward said second end of said handle and for permitting limited axial rnovemerrt of: :~ai~3 pin out of said ._ ~~ d _..
first end of said r~.andle; az:rd a brush. head including a threaded hole operable to tl~areadably engage said threaded portion of said f first end o~ ~a.~~.<~ pin, arid a stop catch projecting from said brush head operable to engage said recess in said first. end of said handle, whereby, ins said brush head is screwed onto said handle, said stop catch contacts said first end of : a:ed hand.la=. a:rnd said pin is pulled out of said handle counter of tle action of said prestressing means until sal_d stop catch engages said recess.
According to a further broad a~apect, the .invention provides a toothbrush comprising: a hanc~.le including a first end having a recess fc~rrnec~~ the:r~=in, a second end, a bearing disposed in said first end an{~ a pin slidably supported within said bearing, <~~a~i.c~ g~:~r; c:;omprising a first end, a shank portion and a second end, said pin defining a longitudina:L axis whereby said ~:~i.r~ is su~:aported for axial.
movement in said bearing substantially parallel to said longitudinal axis, said f:ir.Tt. er~.d o,f ,~aic'i pin including a threaded portion projecting from said fiJ:~st end of said handle, said handle further comprising means for preventing rotation of said pi:~:a and preast~r~=_ssi.ng :neaps connected to said second end of said pin for urgings said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; ar~~ a brus~n hecid defining a longitudinal direct:i.on, said br.~.zsh head laving a first side and bristles pro;ject~ing Pram :~a.i.d f:i~:~-~t: :.,fide substantially tz°ansverse to sa_Ld aongi.tx.~dirla:l direc:t:.:iorn., said brush head further including a threaded hole extends_ng substantially in said longitudinal direct:ion axed opera~::>a_e to threadably engage said threaded portion of said first end of said pin, and a tongue shaped stop catcra projec~::inc~ from an end of __ 4 a ._ said brush head and ext.endiric~ s~zbst.antia:Lly in said longitudinal direction and operable to engage said recess in said first end of said handle, whereby, s~s said brush head is screwed onto said handle, said stop catch contacts said first end of said handle anc:i said. pi.n i.s pulled out: of said handle counter of the action of said prest.ressing means until said stop catch engage=s s~rid recess .
According to a fux-thex: broad aspect, the invention provides a toothbrush compr_i:~in<3: a ~°nancll.e including a first end having a recess formed therein, a second end, a substantially cylindrical bore 3.yrov.ided :in said first end, a bearing formed as a sleeve inserted :in s<~id substantially cylindrical bore, and a ;pi.n slidabl.y ~supi~az°t,ed within said bearing, said pin comprising a first end, a shank portion and a second end, said pin c~efirzing <~ lor-~gitudin.al axis whereby said pin is supported fc..~r axial movement in said bearing substant ial 1y par~ll.e L t::o sai.c:i 3.c~nga_tudinal axis, said first end of said pin including a threaded portion projecting from ,~aic:~ first ~anc~ of sa.lc:~. handle, said h<~ndl.e further comprising means for preventing rotation of said pin and prestressing means conneact~ec~. to s<,r:id second end o.f said pin for urging said pin in a direction toward said second end of said hand:Le and fo:e~ per~na~ttinc:~ l znwi.ted axial movement of said pin out of said first ernd of said handle; and a bx:ush head incluclin<:~ a tlzreadE.d hc:le c:>perable to threadably engage said threaded portion of said first end of said pin, and a stop catch prcaject:ing from sa:ici brush head operable to engage said recess :in said f irst~ end c>>f raid handle, whereby, as said bri.zsh head i:~ s crewed onto said handle, said stop catch contacts said first er~rd c:~f said .handle and said pin is pulled out. of said hand:L.e cou.nter of the action of said prestressiru~ means u:rt.:i.J. said st~cvp catch engages said recess.
_ 4 f= _..
A.ccordinc~ to a fu:rvtrher bread aspect, the invention provides a toothbrush comprising: a. handle including a first end having a reces:~ frvr~rneci trverein, a second end, a bearing disposed in said fi:e:~~>t= eand and a pi_n ~>lidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pzrr:~ i.~ sui:~ported for axial movement in said bearing substantially parallel to said longitudinal axis, said first er~d Uf said pin including a threaded portion projecting fronu said first, end of said handle, said handle further c_omprisin::~ means for preventing rotation of said pin and prestressing means connected to said second end of said pin f:c:~r~ urgi n~ s<~id pin in a direction toward sa~.d second end of said handle and. for permitting limited axial mavement of said pin out of said first end of said handle; and -~~ brush he<~d inclu.din.g a threaded hole operable to trreadably S,~ngK~ge said. threaded portion of said first end of: said pin, and a stop catch projecting from ;~aic:.i brush Y~ead opexv-~i.~le to engage said recess in said first end of said. handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first: end of said hand:~~arid said pin is pulled out of sa:id handle cc:>ur~t~e>r of t:he action of said prestressing means until said stop catch engages said recess.
The invention :is explained .in greater detail below with reference to tine schema.t~~_c°: d:x:aw:i_r~g c:f several illustrative embodiments, in wha_ctz:
Fig. 1 shows a bottom view of ~. toothbrush with mounted brush head, __ ,fig __ Fig . 2 shows the t~c~otl~~brush according to Fig . 1 in a partially sectioned view along the longitudinal centre line, Fig. 3 shows the toothbrush in accordance with Fig. 2 with the brush reread r emo5red and a sliding bewaring sleeve for a threaded pin in partially broken-away representation, Figs. 4 and 5 show twa different modified embodiments of the threaded pin. witr~ia p:restressing device in a section taken perpendiculax°ly .~~v~~' through the longitudinal centre line and in partially broken-away representation, Fig. 6A and Fig. 6B show a view of the rear end of the brush head in accordance with B-B in Fig. 3 in an insertion position and in the operating position, Fig. 7A and Fig. 7B show a view of the rear end of the brush head similar to that in Fig. 6B, with a two-start or three-start thread, Fig. 8 shows a view A-A in Fig. 3, with an inserted sleeve for the threaded pin and Fig. 9 shows a view similar to A-A in Fig. 3 but with a sliding bearing for the threaded pin, the said sliding bearing being integrated into the brush handle.
The dxawings illustrate a toothbrush 20, the brush head 22 of which is removably secured on the brush handle 24. In accordance with Figs. 2 and 3, a threaded pin 26, preferably composed of plastic, which projects from the front end of the brush handle 24, that end which faces the brush head 22, can be screwed into an integral threaded hole 28 which is arranged in a reinforced part of a bristle bed 33; the said part accommodating the bristles 29 of the brush head ;22, in the rear end of the brush head 22, that end which faces the brush handle 24. According to the present invention, the threaded pin 26 is mounted in an axial sliding bearing 30 in the front end of a neck 31 of the brush handle 24 in such a way that it can be moved to a limited extent axially out of the front end of the brush handle 24, counter to the force of a prestressing device 32, but cannot be rotated.
At its front end, the threaded pin 26 is pxovided with a thread 34 which can be screwed into the threaded hole 28 of the brush head 22. Projecting axially from the rear end of the brush head 22, on the side of the bristles 29, is a stop catch 36, to which there corresponds an axial recess 38 in the front end of the brush handle 24. When the brush head 22 is screwed on, the stop catch 36 comes to rest against the end face 40 of the front end of the brush handle 24 after a small angle of rotation. If the screw-on movement of the brush head 22 is continued or a corresponding screw-in movement of the brush handle 24 into the brush head 22 is performed, the threaded pin 26 is pulled out of the front end of the brush handle 24 counter to a prestressing device 32 in accordance with the thread pitch, until the stop catch 36 engages in the recess 38 at the front end of the brush handle 24 and assumes its non-rotatable working position in which it is braced axially in relation to the brush handle 24. If the brush head 22 is to be replaced by another, new brush head, the brush head need only be pulled axially away from the end face 40 of the front end of the brush handle 24 by the length of the stop catch 36, counter to the force of the prestressing device 32, in order to unscrew the brush handle 24 from the thread 34 in the opposite direction of rotation. Fig. 6A depicts the starting position of the brush head 22 for its mounting on the brush handle 24 as well as an arrow X extending over 180°, the said arrow indicating that a half rotation of the brush head 22 for its mounting on the brush handle 24 is sufficient to enable it to assume the working position in accordance with Fig. 6B. As Fig. 7A and Fig. 7B show, a two-start thread 42 or a three-start thread 44 are to be preferred for connecting the brush head 22 and the brush handle 24. The thread 34 and the centring ring 46 expediently have the same diameter.
From Figs. 2 and 3, it can be seen that a centring ring 46 is arranged at the front end of the threaded pin 26, at an axial distance from the thread 34.
Provided in the region of the mouth of the threaded hole 28 in the brush head 22 is a smooth cylindrical portion 48 of the threaded hole 28 for receiving the centring ring 46. The diameters of the thread 34 and of the centring ring 46 of the threaded pin 26 are larger than the shank 50 of the threaded pin, which is displaceably mounted in the brush handle 24. The thread 34 and the centring ring 34 expediently have the same diameter.
As Figs. 2 and 3 furthermore show, the sliding bearing 30 in the brush handle 24 far the threaded pin 26 - 7 - ~fl'~~~~~
is bounded by a transverse wall 52 which serves as a stop for an annular shoulder 54 on the inner end of the threaded pin 26. The transverse wall 52 is provided with an axial bore 56, which has a smaller diameter than the shank 50 of the threaded pin 26 and continues in a guide sleeve 60 towards the inner cavity 58 of the brush handle 24. A guide rod 62 extends through this bore 56 in the transverse wall 52 and through the guide sleeve 60 from that end of the shank 50 of the threaded pin 26 which forms the annular shoulder 54, a supporting disc 64 being secured on 'the outer end of this guide rod 62. The prestressing device 32, which, in the illustrative embodiment of Figs. 2 and 3, is designed as a helical compression spring, is guided on the guide sleeve 60 of the transverse wall 52 and is supported by its two ends between the transverse wall 52 and the supporting disc 68, with the result that the threaded pin 26 is continuously prestressed in the direction of the transverse wall 52.
The shank 50 of the threaded pin 26 is provided with radial projections which engage in longitudinally directed recesses of the sliding bearing 30, allowing only axial mobility. According to Figs. 2 and 3, the radial projections of the shank 50 comprise two trans-verse pins 70 arranged at an axial distance from one another, which project radially from the shank 50 of the threaded pin 26 and engage in elongated slots 72 which only permit axial disglacement and not rotation of the threaded pin 26. According to the illustrative embodiment in Figs. 2 and 3, the diametrically opposite elongated slots 72 for the transverse pins 70 are provided in an inserted sleeve 74 which is inserted into a cylindrical bare 76 in the front end of the brush handle 24 and is arranged therein in a manner which prevents axial dis-placement and fixed in terms of rotation. The inserted sleeve 74 expediently has a polygonal external profile 78, as Fig. 8 shows.
According to another embodiment in Figs. 4 and 5, a threaded pin 80 is provided with longitudinal ribs 82 s - ~ '~ '~ ~~ v ~'~
which are distributed at angular intervals over the circumference and engage with limited longitudinal dis-placeability in corresponding longitudinal grooves 84 of a sliding bearing 85 in the brush handle 86, 'the said longitudinal grooves 84 being delimited at the ends and being moulded directly in the material of a brush handle 86, integrally with the latter. In this case, the threaded pin 80 passes with the same diameter through the front end and a transverse wall 88 of the brush handle 86, which are likewise an integral part of the brush handle 86. Secured on the inner end of the threaded pin 80, which protrudes from the transverse wall 88, is one end of a leaf spring 90 which forms the prestressing device, its other, curved end being placed around a transverse peg 92 in the brush handle 86.
Fig. 5 shows a similar embodiment to that in Fig. 4, identical parts thus being provided with identi-cal reference numerals to those in Fig. 4. As in Fig. 4, a single leaf spring 94 is secured on the inner end of the threaded pin 80 but is then oriented in an S shape towards the interior of a brush handle 96. The other end of the leaf spring 94, which extends axially to the threaded pin 80, is fixed in a transverse wall 98 of the brush handle 86.
The various brush handle embodiments described above comprise hollow handle longitudinal halves produced by injection moulding, into which, as has been described, either the inserted sleeves for the sliding bearing of the threaded pin, the latter likewise preferably being composed completely of plastic, are inserted or in which the sliding bearings are integrally moulded from the plastic material of the brush handle halves by injection, before the associated halves of the thread are firmly welded together, e.g. by high-frequency welding. It should also be understood that it is also possible, when the brush head is produced by injection moulding of plastics, for the threaded hole with, the associated thread to be integrally moulded or, alternatively, for the threaded hole likewise to be formed by a sleeve around which the brush head is moulded or which is inserted into a correspanding bore in the brush head after the moulding of the brush head. The hollow con-figuration of the brush handle saves material and reduces the weight of the said handle, making possible more sensitive cleaning of the teeth with the toothbrush. If required, the threaded pin can be arranged in the brush head and the threaded hole in the brush handle, although the embodiments described above are generally to be preferred.
In all the cases described, the strength of the spring can be designed sc that it is impossible for small children to separate the brush head from the brush handle. The prestressing spring can also be manufactured from plastic.
~~ ~'~~~'l List of reference numerals 20 Toothbrush 22 Brush head 24 Brush handle 26 Threaded pin 28 Threaded hole 29 Bristles 30 Sliding bearing 31 Handle neck 32 Prestressing device 33 Bristle bed 34 Thread 36 Stop catch 38 Recess 40 End face 42 Two-start thread 44 Three-start thread 46 Centring ring 48 Smooth cylindrical portion 50 Shank .
52 Transverse wall 54 Annular shoulder 56 Axial bore 58 Cavity 60 Guide sls~eve 62 Guide rocl 64 Supporting disc 66 Helical compression spring 70 Transverse pin 72 Elongated slats 74 Inserted sleeve 76 Cylindrical bore 78 External profile 80 Threaded pin 82 Longitudinal ribs 84 Longitudinal grooves 85 Sliding bearing 86 Brush handle - 11 - h 88 Transverse wall 90 Leaf spring 92 Transverse peg 94 Leaf spring 96 Brush handle 98 Transverse wall
Claims (15)
1. A toothbrush comprising:
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle and a centering ring spaced from said threaded portion, said to handle further comprising means for preventing rotation of said pin and prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, said threaded hole including a cylindrical portion operable to receive said centering ring, said brush head further comprising a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle and a centering ring spaced from said threaded portion, said to handle further comprising means for preventing rotation of said pin and prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, said threaded hole including a cylindrical portion operable to receive said centering ring, said brush head further comprising a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
2. The toothbrush of claim 1 wherein the diameters of said threaded portion and said centering ring are greater than said shank portion of said pin.
3. The toothbrush of claim 2 wherein said threaded portion and said centering ring have the same diameter.
4. The toothbrush of claim 3 wherein said prestressing means comprises a tension spring and wherein a first end of said tension spring is connected to said second end of said pin and a second end of said tension spring is anchored in said brush handle.
5. A toothbrush comprising:
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and bounded by a transverse wall having a bore therethrough, and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said pin further comprising at least one stop element whereby said transverse wall serves as a stop for said at least one stop element, said second end of said pin extending through said bore in said transverse wall and carrying a supporting disc, said handle further comprising means for preventing rotation of said pin and prestressing means including a helical compression spring disposed between said transverse wall and supporting disc for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin abut of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contracts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and bounded by a transverse wall having a bore therethrough, and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said pin further comprising at least one stop element whereby said transverse wall serves as a stop for said at least one stop element, said second end of said pin extending through said bore in said transverse wall and carrying a supporting disc, said handle further comprising means for preventing rotation of said pin and prestressing means including a helical compression spring disposed between said transverse wall and supporting disc for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin abut of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contracts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
6. A toothbrush comprising:
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handler said handle further comprising means for preventing rotation of said pin, said means for preventing rotation of said pin comprising longitudinally directed, closed-ended recesses provided in said bearing and a plurality of spaced apart, radially projecting transverse pins provided on said shank portion that engage said recesses, said handle further comprising prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contact said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handler said handle further comprising means for preventing rotation of said pin, said means for preventing rotation of said pin comprising longitudinally directed, closed-ended recesses provided in said bearing and a plurality of spaced apart, radially projecting transverse pins provided on said shank portion that engage said recesses, said handle further comprising prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contact said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
7. ~A toothbrush comprising:
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said handle further comprising means for preventing rotation of said pin, said means for preventing rotation of said pin comprising longitudinally directed grooves provided in said bearing and a plurality of longitudinally directed ribs provided on said shank portion that engage said grooves, said handle further comprising prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle;
and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said handle further comprising means for preventing rotation of said pin, said means for preventing rotation of said pin comprising longitudinally directed grooves provided in said bearing and a plurality of longitudinally directed ribs provided on said shank portion that engage said grooves, said handle further comprising prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle;
and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
8. ~A toothbrush comprising:
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said handle further comprising means for preventing rotation of said pin and prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head defining a longitudinal direction, said brush head having a first side and bristles projecting from said first side substantially transverse to said longitudinal direction, said brush head further including a threaded hole extending substantially in said longitudinal direction and operable to threadably engage said threaded portion of said first end of said pin, and a tongue shaped stop catch projecting from an end of said brush head and extending substantially in said longitudinal direction and operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said handle further comprising means for preventing rotation of said pin and prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head defining a longitudinal direction, said brush head having a first side and bristles projecting from said first side substantially transverse to said longitudinal direction, said brush head further including a threaded hole extending substantially in said longitudinal direction and operable to threadably engage said threaded portion of said first end of said pin, and a tongue shaped stop catch projecting from an end of said brush head and extending substantially in said longitudinal direction and operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
9. ~A toothbrush comprising:
a handle including a first end having a recess formed therein, a second end, a substantially cylindrical bore provided in said first end, a bearing formed as a sleeve inserted in said substantially cylindrical bore, and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said handle further comprising means for preventing rotation of said pin and prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
a handle including a first end having a recess formed therein, a second end, a substantially cylindrical bore provided in said first end, a bearing formed as a sleeve inserted in said substantially cylindrical bore, and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said handle further comprising means for preventing rotation of said pin and prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
10. ~The toothbrush of claim 9 wherein the outer circumference of said sleeve is polygonal in cross-section.
11. ~A toothbrush comprising:
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said handle further comprising means for preventing rotation of said pin and prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
a handle including a first end having a recess formed therein, a second end, a bearing disposed in said first end and a pin slidably supported within said bearing, said pin comprising a first end, a shank portion and a second end, said pin defining a longitudinal axis whereby said pin is supported for axial movement in said bearing substantially parallel to said longitudinal axis, said first end of said pin including a threaded portion projecting from said first end of said handle, said handle further comprising means for preventing rotation of said pin and prestressing means connected to said second end of said pin for urging said pin in a direction toward said second end of said handle and for permitting limited axial movement of said pin out of said first end of said handle; and a brush head including a threaded hole operable to threadably engage said threaded portion of said first end of said pin, and a stop catch projecting from said brush head operable to engage said recess in said first end of said handle, whereby, as said brush head is screwed onto said handle, said stop catch contacts said first end of said handle and said pin is pulled out of said handle counter of the action of said prestressing means until said stop catch engages said recess.
12. ~The toothbrush of claim 11 wherein said first end of said brush handle defines a neck portion of said handle, wherein said brush head comprises a bristle bed, and wherein said threaded hole of said brush head is integrated into said bristle bed.
13. ~The toothbrush of claim 11 wherein said brush head is securable onto said brush handle via a 180° angle of screwing rotation of said brush head.
14. ~The toothbrush of claim 11 wherein said threaded portion of said pin and said threaded hole of said brush head are provided with cooperating multi-start threading.
15. ~The toothbrush of claim 11 wherein said bearing is formed of the same material as and molded integrally with said brush handle, and wherein said threaded hole of said brush head is formed of the same material as and molded integrally with said brush head.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4136537.2 | 1991-11-06 | ||
| DE4136537A DE4136537C1 (en) | 1991-11-06 | 1991-11-06 |
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| CA2077517A1 CA2077517A1 (en) | 1993-05-07 |
| CA2077517C true CA2077517C (en) | 2004-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CA002077517A Expired - Fee Related CA2077517C (en) | 1991-11-06 | 1992-11-03 | Toothbrush |
Country Status (10)
| Country | Link |
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| US (1) | US5564152A (en) |
| EP (1) | EP0541096B1 (en) |
| JP (1) | JP3216922B2 (en) |
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| AU (1) | AU654590B2 (en) |
| CA (1) | CA2077517C (en) |
| DE (2) | DE4136537C1 (en) |
| GR (1) | GR1002586B (en) |
| HK (1) | HK1010320A1 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4241468C2 (en) * | 1992-12-09 | 1997-09-25 | Johnson & Johnson Ag | toothbrush |
| DE4345003C1 (en) * | 1993-12-30 | 1995-05-04 | Johnson & Johnson Ag | Toothbrush |
| AU712020B2 (en) * | 1993-12-30 | 1999-10-28 | Johnson & Johnson Consumer Products, Inc. | Toothbrush |
| DE4409817C1 (en) * | 1994-03-22 | 1995-07-27 | Johnson & Johnson Ag | Tooth brush with changeable head |
| US5875510A (en) * | 1996-09-27 | 1999-03-02 | Chesebrough-Pond's Usa Co., Division Of Conopco, Inc. | Replaceable head toothbrush |
| US6079075A (en) * | 1997-07-29 | 2000-06-27 | Velez-Juan; Diego R. | Toothbrush with improved handle and detachable bristled cartridge |
| US6202245B1 (en) * | 1999-03-05 | 2001-03-20 | Ramin Khodadadi | Musical toothbrush |
| US6487748B1 (en) | 2000-08-30 | 2002-12-03 | Jonathan Dardar | Toothbrush with replaceable head |
| US20020123703A1 (en) * | 2000-11-14 | 2002-09-05 | Phillip Mark | Vibratory apparatus for distribution of a coating material |
| JP3886050B2 (en) * | 2003-05-20 | 2007-02-28 | 株式会社 Ｕｆｃサプライ | Interdental brush and manufacturing method thereof |
| US7726032B1 (en) * | 2005-10-25 | 2010-06-01 | Hernandez Elisa M | Safety razor handle assembly |
| US9756931B2 (en) | 2011-11-22 | 2017-09-12 | The Procter & Gamble Company | Method for producing a toothbrush having an inner cavity |
| US9510664B2 (en) | 2011-11-22 | 2016-12-06 | The Procter & Gamble Co | Toothbrush having an inner cavity |
| US9463593B2 (en) | 2011-11-22 | 2016-10-11 | The Procter & Gamble Company | Method for producing a toothbrush having an inner cavity |
| WO2013078355A2 (en) * | 2011-11-22 | 2013-05-30 | The Gillette Company | Toothbrush handle having an inner cavity |
| US9420877B2 (en) | 2011-11-22 | 2016-08-23 | The Procter & Gamble Company | Method for producing a toothbrush having an inner cavity |
| WO2021131526A1 (en) * | 2019-12-23 | 2021-07-01 | ライオン株式会社 | Toothbrush |
| CN217525462U (en) * | 2022-05-07 | 2022-10-04 | 深圳术叶创新科技有限公司 | Brush head assembly of electric toothbrush and electric toothbrush |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE178122C (en) * | ||||
| FR393154A (en) * | 1907-08-09 | 1908-12-15 | Carl Jaegler | Tool guide for device used to shape rebates in wood |
| GB287022A (en) * | 1927-11-15 | 1928-03-15 | Walter Ryser | Improvements in tooth brushes |
| US1859129A (en) * | 1930-12-19 | 1932-05-17 | John H Costenbader | Toothbrush |
| US1942931A (en) * | 1932-11-05 | 1934-01-09 | Earl J Mcwhirter | Toothbrush |
| US2749567A (en) * | 1951-08-07 | 1956-06-12 | Krueger Max | Adjustable tooth brush |
| US2679657A (en) * | 1952-10-17 | 1954-06-01 | Krueger Max | Adjustable toothbrush or related article |
| DE7600205U1 (en) * | 1976-01-07 | 1976-05-13 | Gaedke Geb. Pahnke, Erika, 5330 Koenigswinter | TODDLER TOOTHBRUSH |
| DE3130703C2 (en) * | 1981-08-03 | 1983-10-13 | Wolf-Geräte GmbH, 5240 Betzdorf | Handle attachment coupling, in particular for household and garden tools |
| DE8600750U1 (en) * | 1986-01-15 | 1986-02-27 | Peters, Heinrich Josef, 4178 Kevelaer | Coupling for connecting a broom or the like to a handle |
| DE8607168U1 (en) * | 1986-03-15 | 1987-07-23 | Robert Bosch Gmbh, 7000 Stuttgart, De |
-
1991
- 1991-11-06 DE DE4136537A patent/DE4136537C1/de not_active Expired - Fee Related
-
1992
- 1992-10-26 GR GR920100478A patent/GR1002586B/en not_active IP Right Cessation
- 1992-10-30 AU AU28101/92A patent/AU654590B2/en not_active Ceased
- 1992-11-03 CA CA002077517A patent/CA2077517C/en not_active Expired - Fee Related
- 1992-11-05 DE DE69222392T patent/DE69222392T2/en not_active Expired - Fee Related
- 1992-11-05 EP EP92118985A patent/EP0541096B1/en not_active Expired - Lifetime
- 1992-11-05 JP JP31921992A patent/JP3216922B2/en not_active Expired - Fee Related
- 1992-11-05 KR KR1019920020751A patent/KR100232780B1/en not_active IP Right Cessation
- 1992-11-05 AT AT92118985T patent/ATE158481T1/en not_active IP Right Cessation
-
1996
- 1996-01-18 US US08/588,295 patent/US5564152A/en not_active Expired - Lifetime
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1998
- 1998-09-30 HK HK98111090A patent/HK1010320A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATE158481T1 (en) | 1997-10-15 |
| DE69222392D1 (en) | 1997-10-30 |
| DE69222392T2 (en) | 1998-03-19 |
| JPH05317125A (en) | 1993-12-03 |
| KR930009552A (en) | 1993-06-21 |
| HK1010320A1 (en) | 1999-06-17 |
| GR920100478A (en) | 1993-07-30 |
| AU654590B2 (en) | 1994-11-10 |
| JP3216922B2 (en) | 2001-10-09 |
| EP0541096A1 (en) | 1993-05-12 |
| CA2077517A1 (en) | 1993-05-07 |
| GR1002586B (en) | 1997-02-11 |
| KR100232780B1 (en) | 1999-12-01 |
| EP0541096B1 (en) | 1997-09-24 |
| US5564152A (en) | 1996-10-15 |
| DE4136537C1 (en) | 1993-01-21 |
| AU2810192A (en) | 1993-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |